So does T-Mobile give you $100 for the iPhone 4S? 😀😀😀
(yes I know the 4S doesn't work on T-Mobile or something)
No, they may do a $0 down-payment, with a ~$19 monthly payment for the phone. 😱
The 4S GSM works with T-Mobile US, but you will need to be in a re-farmed area. 😀